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92 relations: Agate, Air gun, Alba County, Amadeus Basin, Archaeology, Arkansas, Australia, Bacteria, Banded iron formation, Billion years, Bulb of applied force, Chalcedony, Chalk, Cleavage (crystal), Clovis culture, Clovis point, Conchoidal fracture, Concretion, Cryptocrystalline, Cyanobacteria, Devonian, Diagenesis, Diatomaceous earth, Dolostone, Eolith, Eraillure, Felsite, Fieldstone, Fig Tree Formation, Firearm, Flint, Flintlock, Geyserite, Green algae, Greensand, Gunflint chert, Gunpowder, Headstone, Hertzian cone, Iron oxide, Jasper, Lake Magadi, Limestone, Lithic flake, Lithic reduction, Macrofossil, Marl, Metamorphism, Microcrystalline, Micropaleontology, ..., Mineraloid, Miocene, Monterey Formation, Mozarkite, Neogene, New Mexico, Nodule (geology), Novaculite, Obsidian, Oklahoma, Omnipresence, Onyx, Opal, Ouachita Mountains, Petrology, Piatra Tomii, Pilbara Craton, Precambrian, Prokaryote, Quartz, Quartzite, Radiolaria, Radiolarite, Recrystallization (geology), Redox, Rhynie chert, Rhyolite, Romania, Sedimentary rock, Silicon dioxide, South Africa, South Carolina, Stone tool, Striking platform, Swaziland, Texas, Tinderbox, Tool stone, Unicellular organism, United States, Weathering, Whinstone. Expand index (42 more) »
Agate
Agate is a rock consisting primarily of cryptocrystalline silica, chiefly chalcedony, alternating with microgranular quartz.
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Air gun
An air gun (or airgun) is any kind of gun that launches projectiles pneumatically with compressed air or other gases that are pressurized mechanically without involving any chemical reactions, in contrast to a firearm, which relies on an exothermic chemical oxidation (deflagration) of combustible propellants to generate propulsive energy.
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Alba County
Alba is a county (județ) of Romania, in Transylvania, its capital city being Alba-Iulia with a population of 63,536.
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Amadeus Basin
The Amadeus Basin is a large (ca. 170,000 km²) intracratonic sedimentary basin in central Australia, lying mostly within the southern Northern Territory, but extending into the state of Western Australia.
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Archaeology
Archaeology, or archeology, is the study of humanactivity through the recovery and analysis of material culture.
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Arkansas
Arkansas is a state in the southeastern region of the United States, home to over 3 million people as of 2017.
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Australia
Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands.
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Bacteria
Bacteria (common noun bacteria, singular bacterium) is a type of biological cell.
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Banded iron formation
Banded iron formations (also known as banded ironstone formations or BIFs) are distinctive units of sedimentary rock that are almost always of Precambrian age.
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Billion years
A billion years (109 years) is a unit of time on the petasecond scale, more precisely equal to seconds.
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Bulb of applied force
In lithic analysis, a subdivision of archaeology, a bulb of applied force (also known as a bulb of percussion or simply bulb of force) is a defining characteristic of a lithic flake.
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Chalcedony
Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite.
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Chalk
Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite.
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Cleavage (crystal)
Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite crystallographic structural planes.
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Clovis culture
The Clovis culture is a prehistoric Paleo-Indian culture, named for distinct stone tools found in close association with Pleistocene fauna at Blackwater Locality No. 1 near Clovis, New Mexico, in the 1920s and 1930s.
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Clovis point
Clovis points are the characteristically-fluted projectile points associated with the New World Clovis culture.
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Conchoidal fracture
Conchoidal fracture describes the way that brittle materials break or fracture when they do not follow any natural planes of separation.
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Concretion
A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil.
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Cryptocrystalline
Cryptocrystalline is a rock texture made up of such minute crystals that its crystalline nature is only vaguely revealed even microscopically in thin section by transmitted polarized light.
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Cyanobacteria
Cyanobacteria, also known as Cyanophyta, are a phylum of bacteria that obtain their energy through photosynthesis, and are the only photosynthetic prokaryotes able to produce oxygen.
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Devonian
The Devonian is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya.
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Diagenesis
Diagenesis is the change of sediments or existing sedimentary rocks into a different sedimentary rock during and after rock formation (lithification), at temperatures and pressures less than that required for the formation of metamorphic rocks.
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Diatomaceous earth
Diatomaceous earth – also known as D.E., diatomite, or kieselgur/kieselguhr – is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder.
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Dolostone
Dolostone or dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2.
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Eolith
An eolith (from Greek "eos", dawn, and "lithos", stone) is a chipped flint nodule.
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Eraillure
In lithic analysis (a subdivision of archaeology), an eraillure is a flake removed from a lithic flake's bulb of force, which is a lump left on the ventral surface of a flake after it is detached from a core of tool stone during the process of lithic reduction.
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Felsite
Felsite is a very fine-grained volcanic rock that may or may not contain larger crystals.
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Fieldstone
Fieldstone is a building construction material.
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Fig Tree Formation
The Fig Tree Formation is a stromatolite-containing geological formation in South Africa.
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Firearm
A firearm is a portable gun (a barreled ranged weapon) that inflicts damage on targets by launching one or more projectiles driven by rapidly expanding high-pressure gas produced by exothermic combustion (deflagration) of propellant within an ammunition cartridge.
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Flint
Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert.
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Flintlock
Flintlock is a general term for any firearm that uses a flint striking ignition mechanism.
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Geyserite
Geyserite is a form of opaline silica that is often found around hot springs and geysers.
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Green algae
The green algae (singular: green alga) are a large, informal grouping of algae consisting of the Chlorophyta and Charophyta/Streptophyta, which are now placed in separate divisions, as well as the more basal Mesostigmatophyceae, Chlorokybophyceae and Spirotaenia.
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Greensand
Greensand or green sand is a sand or sandstone which has a greenish color.
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Gunflint chert
The Gunflint chert (1.88 Ga) is a sequence of banded iron formation rocks that are exposed in the Gunflint Range of northern Minnesota and northwestern Ontario along the north shore of Lake Superior.
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Gunpowder
Gunpowder, also known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive.
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Headstone
A headstone, tombstone, or gravestone is a stele or marker, usually stone, that is placed over a grave.
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Hertzian cone
A Hertzian cone is the cone produced when an object passes through a solid, such as a bullet through glass.
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Iron oxide
Iron oxides are chemical compounds composed of iron and oxygen.
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Jasper
Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases,Kostov, R. I. 2010.
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Lake Magadi
Lake Magadi is the southernmost lake in the Kenyan Rift Valley, lying in a catchment of faulted volcanic rocks, north of Tanzania's Lake Natron.
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Limestone
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs.
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Lithic flake
In archaeology, a lithic flake is a "portion of rock removed from an objective piece by percussion or pressure,"Andrefsky, W. (2005) Lithics: Macroscopic Approaches to Analysis.
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Lithic reduction
In archaeology, in particular of the Stone Age, lithic reduction is the process of fashioning stones or rocks from their natural state into tools or weapons by removing some parts.
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Macrofossil
Macrofossils, also known as megafossils, are preserved organic remains large enough to be visible without a microscope.
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Marl
Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt.
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Metamorphism
Metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change).
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Microcrystalline
A microcrystalline material is a crystallized substance or rock that contains small crystals visible only through microscopic examination.
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Micropaleontology
Micropaleontology (also sometimes spelled as micropalaeontology) is the branch of palaeontology that studies microfossils, or fossils that require the use of a microscope to see the organism, its morphology and its characteristic details.
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Mineraloid
A mineraloid is a mineral-like substance that does not demonstrate crystallinity.
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Miocene
The Miocene is the first geological epoch of the Neogene Period and extends from about (Ma).
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Monterey Formation
The Monterey Formation is an extensive Miocene oil-rich geological sedimentary formation in California, with outcrops of the formation in parts of the California Coast Ranges, Peninsular Ranges, and on some of California's off-shore islands.
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Mozarkite
Mozarkite is a form of chert (flint).
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Neogene
The Neogene (informally Upper Tertiary or Late Tertiary) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago (Mya) to the beginning of the present Quaternary Period Mya.
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New Mexico
New Mexico (Nuevo México, Yootó Hahoodzo) is a state in the Southwestern Region of the United States of America.
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Nodule (geology)
In sedimentology and geology, a nodule is small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition, such as a pyrite nodule in coal, a chert nodule in limestone, or a phosphorite nodule in marine shale, from the enclosing sediment or sedimentary rock.
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Novaculite
Novaculite, also called Arkansas Stone, is a microcrystalline to cryptocrystalline rock type that consists of silica in the form of chert or flint.
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Obsidian
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.
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Oklahoma
Oklahoma (Uukuhuúwa, Gahnawiyoˀgeh) is a state in the South Central region of the United States.
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Omnipresence
Omnipresence or ubiquity is the property of being present everywhere.
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Onyx
Onyx is a banded variety of the oxide mineral chalcedony.
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Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%.
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Ouachita Mountains
The Ouachita Mountains, simply referred to as the Ouachitas, are a mountain range in western Arkansas and southeastern Oklahoma.
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Petrology
Petrology (from the Greek πέτρος, pétros, "rock" and λόγος, lógos, "subject matter", see -logy) is the branch of geology that studies rocks and the conditions under which they form.
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Piatra Tomii
Piatra Tomii is a late Jurassic limestone outcrop forming a small hill near Răcătau village, Alba county, Romania.
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Pilbara Craton
The Pilbara Craton is an old and stable part of the continental lithosphere located in Pilbara, Western Australia.
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Precambrian
The Precambrian (or Pre-Cambrian, sometimes abbreviated pЄ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon.
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Prokaryote
A prokaryote is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle.
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Quartz
Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.
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Quartzite
Quartzite (from Quarzit) is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone.
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Radiolaria
The Radiolaria, also called Radiozoa, are protozoa of diameter 0.1–0.2 mm that produce intricate mineral skeletons, typically with a central capsule dividing the cell into the inner and outer portions of endoplasm and ectoplasm.The elaborate mineral skeleton is usually made of silica.
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Radiolarite
Radiolarite is a siliceous, comparatively hard, fine-grained, chert-like, and homogeneous sedimentary rock that is composed predominantly of the microscopic remains of radiolarians.
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Recrystallization (geology)
In geology, solid-state recrystallization is a metamorphic process that occurs under temperature and pressure where atoms of a mineral are reorganized by diffusion and/or dislocation glide.
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Redox
Redox (short for reduction–oxidation reaction) (pronunciation: or) is a chemical reaction in which the oxidation states of atoms are changed.
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Rhynie chert
The Rhynie chert is an Early Devonian sedimentary deposit exhibiting extraordinary fossil detail or completeness (a Lagerstätte).
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Rhyolite
Rhyolite is an igneous, volcanic rock, of felsic (silica-rich) composition (typically > 69% SiO2 – see the TAS classification).
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Romania
Romania (România) is a sovereign state located at the crossroads of Central, Eastern, and Southeastern Europe.
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Sedimentary rock
Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water.
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Silicon dioxide
Silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula, most commonly found in nature as quartz and in various living organisms.
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South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa.
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South Carolina
South Carolina is a U.S. state in the southeastern region of the United States.
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Stone tool
A stone tool is, in the most general sense, any tool made either partially or entirely out of stone.
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Striking platform
In lithic reduction, the striking platform is the surface on the proximal portion of a lithic flake on which the detachment blow fell; this may be natural or prepared.
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Swaziland
Swaziland, officially the Kingdom of Eswatini since April 2018 (Swazi: Umbuso weSwatini), is a landlocked sovereign state in Southern Africa.
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Texas
Texas (Texas or Tejas) is the second largest state in the United States by both area and population.
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Tinderbox
A tinderbox is a container made of wood or metal containing flint, firesteel, and tinder (typically charcloth, but possibly a small quantity of dry, finely divided fibrous matter such as hemp), used together to help kindle a fire.
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Tool stone
In archaeology, a tool stone is a type of stone that is used to manufacture stone tools, or stones used as the raw material for tools.
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Unicellular organism
A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell, unlike a multicellular organism that consists of more than one cell.
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United States
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
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Weathering
Weathering is the breaking down of rocks, soil, and minerals as well as wood and artificial materials through contact with the Earth's atmosphere, water, and biological organisms.
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Whinstone
Whinstone is a term used in the quarrying industry to describe any hard dark-coloured rock.
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Redirects here:
Arkansas flint, Chert and Flint, Chirt.
References
[1] https://en.wikipedia.org/wiki/Chert
